Q: Where can I find the H2 Biology 9477 syllabus PDF for 2026 and 2027, and what does it cover? A: The current SEAB H2 Biology code for the 2026 and 2027 A-Level exams is 9477. This page links the official PDF, all four specimen papers, Paper 1-4 weightings, and notes for the four Core Ideas plus Extension topics A and B.
TL;DR If you searched for h2 biology syllabus 2026, h2 bio syllabus 2026, or 9477 syllabus, use the official 9477 PDF. Papers 2 and 3 together carry 65 % of the final grade, while Paper 4 carries 20 %.
Which Syllabus Applies?
Sitting H2 Biology in 2026 or 2027 under the revised route: use 9477.
Registered for the outgoing syllabus in 2026: use 9744, which SEAB lists for its final examination year.
Unsure which code applies: check the code assigned by your school before using inherited notes or past papers.
The official syllabus PDF defines the complete examinable scope. The specimen papers show how that scope can be assessed, but they do not replace the syllabus.
Use the PDF for your examination year. Students registered for the outgoing 9744 syllabus in its final 2026 examination year should use the code assigned by their school.
The published skill weighting is 36 % knowledge and understanding, 44 % handling information and solving problems, and 20 % experimental skills and investigations.
Paper 1: 1 h, 30 marks, 15 %. Thirty multiple-choice questions. Use the Paper 1 MCQ playbook.
Paper 2: 2 h, 90 marks, 30 %. Structured questions with data and unfamiliar contexts. Use the Paper 2 structured strategy.
Paper 3: 2 h, 75 marks, 35 %. Long structured questions, data-based questions, and one free-response question. Use the Paper 3 free-response guide.
Paper 4: 2 h 30 min, 50 marks, 20 %. Planning, manipulation and measurement, presentation of data, and analysis, conclusions, and evaluation. Use the Paper 4 practical strategy and practical experiments hub.
Mathematical work can include percentages, ratios, rates, logarithms, graph interpretation, standard deviation, standard error, chi-squared tests, and Hardy-Weinberg calculations. The official syllabus states the required mathematical scope.
The revised 9477 syllabus has its first examination in 2026. SEAB lists 2026 as the final examination year for 9744.
Change
9477 position
What to do with older notes
Prokaryotic gene regulation
Lac and trp operon mechanisms are not named. Eukaryotic regulation remains required.
Treat detailed operon mechanisms as enrichment unless your school says otherwise.
G-protein linked receptors
Glucagon signalling remains required, but GPCR molecular structure is no longer a named protein objective.
Keep the signalling application; do not overlearn receptor structure.
Inheritance
Codominance, multiple alleles, sex linkage, autosomal linkage, and epistasis remain. Incomplete dominance is not named.
Check inherited genetics notes against the 9477 wording.
Hardy-Weinberg
The model and quantitative calculations are explicit.
Add calculation and interpretation practice.
Assessment
Paper 2 is 90 marks, Paper 4 is 50 marks, and the Paper 3 free-response question is 20 marks.
Replace old mark allocations before planning timed practice.
Frequently Asked Questions
How many topics are in the H2 Biology syllabus?
The syllabus is organised into four Core Ideas and two Extension topics. Each contains several learning outcomes, so the official PDF is a better checklist than an informal topic count.
Which topics carry the most marks?
SEAB does not publish a fixed topic-by-topic mark allocation. The published weighting is by skill and paper, and questions may integrate material across syllabus areas.
How should I prepare for Paper 4?
Practise planning, measurement, tables, graphs, calculations, conclusions, and evaluation throughout JC1 and JC2. Use the H2 Biology practical experiments hub to choose a skill or experiment.
Should I use 9744 notes for 9477?
Only after checking them against the 9477 PDF. Some biological ideas remain useful, but the named scope and paper format have changed.
